Magnetic recording sheet copying device

ABSTRACT

A magnetic recording sheet copying device wherein a recorded master sheet and a copying sheet are disposed upon a holding plate of the machine frame in pressure contact superposed relation with each other. An electromagnet for producing a magnetic field for copying is assembled in unison with a reversible motor which is reciprocated within the frame. In the advance stroke of the assembly the electromagnet is energized while upon the start of its return stroke, the electromagnet is deenergized and the motor is reversed by a changeover switch so as to make a return stroke, and at the end of the return stroke the motor is deenergized by the actuation of the changeover switch.

0 United States Patent [111 3,602,649

[72] Inventor Ensei R111 [56] References Cited A I N 5 23 23 11 UNITED STATES PATENTS pp o. Filed Jan. 21 1969 2,986,609 5/1961 Yasushl Hoshlno et a1... 179/1002 45 Patented Aug.31, 1971 FOREIGN PATENTS [73] Assignee Kabushiki Kakha Rico]; 880,570 10/1961 Great Britain 179/1002 Tokyo, Japan Prima ry Examiner- Bernard Komck Priority 23, 1968 Assistant Examiner--A1fred H. Eddleman P l 3 i 1 43/4252 Attorney Burgess, Ryan and HlCkS ABSTRACTi A magnetic recording sheet copying device wherein a recorded master sheet and a copying sheet are disposed upon a holding plate of the machine frame in pressure contact superposed relation'with each other. An electromagnet for producing a magnetic field for copying is assem- [54] MAGNETIC RECORDmG SHEET CoPYlNG bled in unison with a reversible motor which is reciprocated DEVICE 2 Chimsfl Drawing Figs. within the frame. In the advance stroke of the assembly the electromagnet IS energized while upon the start of its return [52] U .S.Cl. stroke, the electromagnet is deenergized and the motor is [51] Int. Cl. ,Gllb 5/86 reversed by a changeover switch so as to make a return stroke, [50] Field of Search 179/ 100.2 and at the end of the return stroke the motor is deenergized by E, 100.2 A, 100.2 T; 340/174.1 G, 174.1 H

the actuation of the changeover switch.

PAIENTEU AUB31 l9?! 3.602 649 SHEET 1 UF 2 INVENTOR 51/55/ Pi/v ATTORNEY 5 PATENTEDAUB31 Ian 3,602,649

SHEET 2 [IF 2 INVENTOR [/Vb'E/ ILPILN BY ,g w "M ATTORNEYS The present invention relates to a magnetic recording sheet copying device and more particularly a device of the type wherein the content of the recording in a recording sheet in which a magnetic material is applied to a portion to be recorded of a paper or the like is copied onto another magnetic recording sheet.

There has been known a method in which a magnetically recorded master sheet having a spiral recording portion as typically shown in FIG. 7 is superposed upon a magnetic sheet, and the superposed magnetic sheets are disposed in the magnetic field of an electromagnet thereby copying the magnetically recorded content of the master sheet onto the copying sheet, and other various methods of the type described have been proposed. For example, as shown in FIG. 7 a magnetic material is applied to a portion of a paper having a plurality of suitably located service holes, and to this portion is copied the recording content of the master sheet in 'which the magnetic recording is made along the spiral magnetic recording path. In this case, is employed illustratively a method in which the master sheet of the type described is superposed upon a copy sheet, and both of the sheets are disposed within the magnetic field produced from an electromagnet whose dimensions are large enough to cover the whole magnetically recording spiral portion of the master sheet so as to effect the copying instantaneously. Another illustrative method is such that an electromagnet is disposed along one radius of the spiral portion and is rotated over the spiral portion one time so as to effect the magnetic copying. However, in both of the methods described above, the distortion in the magnetic field caused at the instant of the deenergization of the electromagnet is recorded or copied also in the sheet as noises so that these methods are not preferable. Therefore, it is recommended in copying of the type described to superpose the master sheet over a copying sheet as described above and to place outwardly of one of the sheets an electromagnet whose length is longer than the diameter of the spiral portion and to move the electromagnet relative to and in parallel with the superposed sheets. In this case, when the superposed sheets are moved relative to the electromagnet, the distance of the travel of the superposed sheet becomes longer because they have portions thereon to which is not applied a magnetic material, thus inevitably enlarging the dimensions of the copying device of the type described. Furthermore it is desired to press closely both of the sheets relative to each other in order to facilitate the copying efficiency. In this case, the problems will arise in design of the device in such a manner that the superposed sheets may be moved together with a pressure applying means for the purpose described above. In view of the above, it is far preferable to reciprocate the electromagnet by a predetermined distance relative to the superposed sheets. In this case, however, when the reversible motor for reciprocating the electromagnet is disposed outside of the device, the interconnection between the motor and the electromagnet must be made by, for example, an endless belt or the like, thus bringing about the complicated construction and the noisy operation of the device.

In view of the above, one of the objects of the present invention is to eliminate the above described defects encountered in the conventional devices of the type described.

Another object of the present invention is to provide a magnetic recording sheet copying device with a simple construction but high efficiency.

SUMMARY OF THE INVENTION According to the invention, a master sheet is disposed upon a top plate of the outer casing of the device in pressure contact superposed relation with a copying sheet; an assembly of a reversible motor and an electromagnet is so arranged and disposed so as to be reciporcated along the path in parallel with the top plate within the outer casing; and at the end of the stroke of the assembly the rotation of the reversible motor is reversed and concurrently the electromagnet is deenergized in the return stroke, thus eliminating the adverse action of the magnetic lines of force upon the magnetic sheets.

The above and other objects, features and advantage of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS:

FIG. 1 is a sectional view taken along the line I-I of FIG. 2 illustrating the essential part of one embodiment of the present invention;

FIG. 2 is a side sectional view taken along the line "-1! of FIG. 1;

FIG. 3 is an enlarged view illustrating only a microswitch actuating member of FIG. 1;

FIG. 4 isa top view of FIG. 3;

FIG. 5 is a top view similar to FIG. 4 illustrating the relative movement of assembly components of the actuating member shown in FIG. 3 when actuated;

FIG. 6 is a wiring diagram of electrical components employed in the embodiment of the present invention; and

FIG. 7 is a top view illustrating a typical magnetically recorded master sheet to be copied to unrecorded sheets by the device of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT:

The outer casing shown in FIG. 1 comprises a top plate la, a bottom plate 1b, a pair of front and rear end plates 10 and a pair of right and left side plates Id. The height of each of the right and left side plates 1d standing uprightly from the bottom plate 1b is lower than that of the end plate 1c, and the upper side edges of the side plates path for an electromagnet provided with a reversible motor. In the vicinity of one side of the upper or top plate la is pivoted one side edge of a pressing plate 3 provided at the undersurface thereof with an elastic pad 2. When the free side edge of the pressing plate 3 is pushed down and engaged with a latch 6 fixed to the outer casing, a master sheet 4 and a copying sheet 5 which are placed upon the top plate la of the outer casing in superposed relation with the magnetized surfaces thereof being in contact with each other are pressed against each other and held in position over the top plate la.

An electromagnet 7 whose length is longer than the diameter of the spiral recording portion of the master sheet 4 shown in FIG. 2 is attached to the upper surface of a baseplate 8. Rollers 10 carried at the ends of a traverse shaft 9 extending between a pair of journal plates and 8b depending from the under surface of the baseplate 8 ride upon the upper side edges of the sideplate Id respectively. A toothed wheel 12 is carried by a reduction output shaft of a reversible motor 11 mounted upon the undersurface of the baseplate 8 and is in mesh with a toothed wheel 13 carried by the transverse shaft 9 coaxial with the rollers 10.

A microswitch actuating member assembled as a unit is riveted to a securing plate 14 made of an angle material at the exterior of one end plate 1d of the outer casing remote from the pivot of the pressing plate 3 (See FIGS. 2 and 5). A supporting plate 15 is attached to the horizontal portion 14a of the securing plate 14 in such a manner that the horizontally bent portion 15:: is attached to the horizontal portion of the securing plate 14 in a suitable manner and another horizontal portion of the supporting plate 15 is spaced apart from the horizontal portion 14a by a suitable distance in the vertical direction. At an intermediate portion of the inner side edge (the left edge in FIGS. 4 and 5) the supporting plate 15 is provided with a notch 16. An upper supporting plate 17 is disposed above the supporting plate 15 in such a manner that a bent side edge portion of the supporting plate 17 is disposed above the supporting plate 15 in such a manner that id provides a reciprocating travel a bent side edge portion 170 of the supporting plate 17 is riveted along one side edge of the lower supporting plate 15 and the upper supporting plate 17 is vertically spaced apart from the lower supporting plate 15 by a suitable distance. At the upper surface of the supporting plate 17 is attached by means of rivets a microswitch S which is normally opened.

As shown in FIG. 3, between the supporting plate 15 and the horizontal portion 14a of a securing plate 14 is disposed a rocking member 18 U-shaped in cross section so as to have a tendency to rotate in the counterclockwise direction about a vertical shaft 19 by means of a spring not shown. At the upper surface of the lower supporting plate 15 is disposed a plate 20 having at one side edge thereof a notch 20a and at the other side edge thereof a protruding portion 20b so as to be slidable in both directions in FIG. relative to the supporting plate 15. A member22 is rotatably carried by a vertical shaft 21 (see FIG. 5) above the horizontal portion 14a of the angle-shaped securing plate 14, and an upright portion 22a protruding from one portion of the member 22 loosely extends through the notch 16 (see FIG. 4) in the longitudinal direction of the lower supporting plate 15. The upper side edge of the upright portion 22a is engaged in the notch 20a of the sliding plate 20. The rotary member 22 has a tendency to rotate in the clockwise direction in FIG. 4 about the shaft 21 by means of a spring not shown, and an upright portion 22b (See FIG. 4) extending from another portion of the rotary member 22 in the longitudinal direction is detachably engaged with the extreme end of the rocking member 18. The other end of the rocking member 18 is provided with a roller 23, which as shown in FIG. 2 extends through a hole provided in the side plate 1d of the outer casing into the interior of the device so as to be movable into the traveling path of the device so as to be movable into the traveling path of the protrusion 80 fixed upon and extended from the journal plate 8b depending from the base plate 8 to which is mounted the motor 11.

When the baseplate 8 carrying the motor 11 reaches the left stroke end indicated by the two-dot chain line in FIG. 1, the member 8d depending from the baseplate 8 contacts with the movable element of a microswitch S, which is normally opened so that the switch S, is closed.

The electromagnet 7, the reversible motor 11 and microswitches S and S both of which are normally opened are switched concurrently by means of a gang switch 8,, 8,, and S which is switched by an electromagnetic relay Y in FIG. 6, and are interconnected with each other as shown in FIG. 6. In FIG. 6, a main switch is designated by S,,, and neon lamps, by L and L Next the mode of operation of the electromagnetic recording sheet copying device with the construction described hereinabove will be described. Upon throwing the main switch S,, in FIG. 6, the neon lamp L is lighted. By the operation from the exterior of the device, the rotary member 22 which is held in the state as shown in FIG. 5 is rotated in the direction indicated by the arrow against its clockwise rotation tendency, thereby causing the upright portion 22a of the rotary member 22 to slide the plate 20 toward the right in the same figure. Therefore, the upright portion 20b of the plate 20 pushes the contact element of the microswitch S so that the switch S is closed. When the rotary member 22 is positioned as shown in FIG. 4, the end 180 of the rocking member 18 having a tendency to rotate in the counterclockwise direction is engaged with the upright portion 220 of the rotary member 22 so that the rotary member is held in the state as shown in FIG. 4 against its rotation tendency. Upon closing the microswitch 8,, the electric current flows through the switch S S, and 8,. so that the motor 11 is driven, the electromagnet 7 is energized and the neon lamp L, is lighted. Since the rollers are driven upon the above operation, electromagnet 7 together with the motor 11 is caused to move toward the left in FIG. 1 from the position indicated by the solid line along the path of the upper side edges of the side plates Id. In this case, the master sheet 4 remains in superposed relation with the copying sheet 5 and is pressed between the top plate Ia of the other casing and the pad 2 of the pressing plate 3 so that the magnetic copying or transfer of the recording'content from the master sheet 4 to the copying sheet 5 can be effected. When the magnet 7 reaches the end of its stroke indicated by two-dot chain line in FIG. 1, the depending member 8d of the base plate 8 contacts with the contact element of the switch S g which is normally opened so that it is closed. At the same time, the electromagnet relay Y is actuated so that the gang switches S,,, S, and S in FIG. 6 are actuated, thereby contacting the moving contacts to the other fixed contacts. Then, the motor 11 is reversed so that the base plate 8 together with the electromagnet 7 is caused to make a return stroke toward the right in FIG. 1, thereby opening the switch 8,. Therefore, during the return stroke, the electromagnet 7 is not energized. At the instant of the start of the above return stroke, the microswitch S, is returned to its normally opened state while the switch 8,. in turn is closed so that the electromagnetic relay Y remains in the actuated state. When the electromagnet reaches its end of the return stroke, the member 8c (SEE FIG. 1) extending from the journal plate 8b made integral with the baseplate 8 upon which is carried the electromagnet 7 abuts against the roller 23 shown in FIG. 4 so as to rotate it in the clockwise direction about the shaft 19 against the tendency of the roller 23. Therefore, the engagement of the end 18a with the upright portion 22b of the rotary member 22 is released and the consequent rotation of 22a causes the member 20 to side to the left in FIG. 4 so that the contact element of the microswitch S is allowed to extend again, thereby opening this switch S and deenergizing the electromagnetic relay Y. Then, the gang switches S S and S are returned to their normal state as indicated in FIG. 6, so that the neon lamps are turned ofi. Thus, one sheet copying operation cycle is accomplished, and the device is returned to its original position.

The present invention has been so far described in detail with particular reference of one preferred embodiment thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the present invention as described hereinabove and as defined in the appended claims.

Iclaim:

l. A magnetic recording sheet copying device comprising a housing;

a magnetic copying sheet positionable on top of said housing; v

a magnetically recorded master sheet positionable on top of said copying sheet;

pressing means adapted to contact said master sheet to press said sheets together;

mounting means positioned within said housing including spaced horizontal surfaces;

electromagnetic means including an extending element located within said housing and including roller means adapted to roll on said horizontal surfaces in a reciprocating movement;

a power source;

motor means mounted within said housing and connected to said power source;

drive means mounted within said housing and connected between said motor means and said roller means so that energization of said motor means drives said electromagnetic means horizontally in said reciprocating movement within said housing;

a first switch means located within said housing adjacent tone side thereof, said switch means connected to said power source and adapted to simultaneously energize said motor means and said electromagnetic means whereby said electromagnetic means is driven in energized form from one side of said housing to the other; and

a second switch means located within said housing adjacent a side opposite to said one side and adapted to be contacted by said extending element of said electromagnetic means to deenergize said electromagnetic means and effect a return of said reciprocating movement.

means at the beginning of said reciprocating movement and rockable by contact with said second extending element to deenergize said first switch means at the end of said reciprocating movement. I 

1. A magnetic recording sheet copying device comprising a housing; a magnetic copying sheet positionable on top of said housing; a magnetically recorded master sheet positionable on top of said copying sheet; pressing means adapted to contact said master sheet to press said sheets together; mounting means positioned within said housing including spaced horizontal surfaces; electromagnetic means including an extending element located within said housing and including roller means adapted to roll on said horizontal surfaces in a reciprocating movement; a power source; motor means mounted within said housing and connected to said power source; drive means mounted within said housing and connected between said motor means and said roller means so that energization of said motor means drives said electromagnetic means horizontally in said reciprocating movement within said housing; a first switch means located within said housing adjacent tone side thereof, said switch means connected to said power source and adapted to simultaneously energize said motor means and said electromagnetic means whereby said electromagnetic means is driven in energized form from one side of said housing to the other; and a second switch means located within said housing adjacent a side opposite to said one side and adapted to be contacted by said extending element of said electromagnetic means to deenergize said electromagnetic means and effect a return of said reciprocating movement.
 2. A magnetic recording sheet copying device according to claim 1 in which said electromagnetic means includes a second extending element, and said first switch means includes a member that is slidable to energize said first switch means at the beginning of said reciprocating movement and rockable by contact with said second extending element to deenergize said first switch means at the end of said reciprocating movement. 